6-Fluorothio-4-chromanone (CAS No.21243-18-5), its synonyms are 4H-1-Benzothiopyran-4-one, 6-fluoro-2,3-dihydro- ; 6-Fluoro-2,3-dihydro-4H-thiochromen-4-one ; 6-Fluorothiochroman-4-one .